Electronic Oil Pump Thermal Sensing Layout for Simpler Integration
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Solution Overview
Problem
The existing lubrication and cooling systems of vehicles powered by electronic oil pumps have complex system structures due to mechanical and electrical connections of temperature sensors, which complicates the system design and increases the number of components.
Innovation Solution
An electronic oil pump design that integrates a temperature sensing unit within the pump structure, eliminating the need for separate mechanical and electrical connections, and utilizes a heat conducting member to transfer heat without electrical conduction, simplifying the system and reducing interference with temperature detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is arranged on the inlet pipeline of the electronic oil pump with mechanical and electrical connections through a wiring harness, then the oil temperature can be detected, but the system structure becomes complex
Solution Approach 1:
The patent integrates the temperature sensor directly into the electronic oil pump assembly by embedding it within the pump housing or motor assembly. This merging of the sensor into the existing structure eliminates the need for separate wiring harnesses and external mounting, thereby reducing system complexity while maintaining temperature detection capability
Solution Approach 2:
The pump housing or motor assembly serves multiple functions: it provides structural support, contains lubricating oil, and now also serves as the mounting structure for the temperature sensor. This multi-functionality reduces the number of separate components needed in the system
2Loss of information
If a temperature sensor is connected with a control unit through a wiring harness, then temperature data can be transmitted, but the number of components and connections increases
Solution Approach 1:
The temperature sensor is electrically connected directly to the control unit through integrated circuit traces within the pump assembly rather than through external wiring harnesses. This integration reduces the number of discrete electrical connections and components while ensuring reliable data transmission
3Reliability
If mechanical connections are used for the temperature sensor, then the sensor can be mounted securely, but the system becomes more complex and costly
Solution Approach 1:
The temperature sensor is mounted directly to the pump housing or motor assembly using integrated mounting features such as recesses, adhesives, or press-fit structures that are part of the manufacturing process. This eliminates the need for separate mechanical mounting components while ensuring secure attachment and reliable thermal contact
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The integrated design reduces the complexity and cost of the system by minimizing mechanical and electrical connections, enhances temperature detection accuracy, and improves heat dissipation through efficient heat transfer, resulting in a more compact and efficient electronic oil pump.
Implementation Method 1
the heat conducting member includes a first part and a second part, the first part is located in the second cavity, the second part is located in the third cavity
Implementation Method 2
the temperature sensing unit can detect the temperature of the nearest metal layer, or the temperature sensing unit can detect the temperature of the upper plate layer contacting with the nearest metal layer or the temperature of the lower plate layer contacting with the nearest metal layer
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
An electronic oil pump (100), comprising a first rotor assembly (2), a stator assembly (4), an electric control board assembly (6), an isolation member (5) and thermal conductive members (9); wherein the first rotor assembly (2) is located in a first chamber (70) of the electronic oil pump (100), the thermal conductive members (9) each comprise a first portion (91) and a second portion (92), the first portions (91) being located in a second chamber (80) of the electronic oil pump (100), the second portions (92) being located in a third chamber (90) of the electronic oil pump (100); wherein the electric control board assembly (6) comprises a base plate (61) and a temperature-sensing unit (13), the base plate (61) comprising first holes (611), an upper plate layer (612), a lower plate layer (613) and at least one metal layer (614), a part of the second portions (612) being located in the first holes (611); wherein the temperature-sensing unit (13) is located at one side of the second portion (92), there is a preset distance between the temperature-sensing unit (13) and the second portion (92); wherein the metal layer (614) closest to the temperature-sensing unit (13) is defined as the closest metal layer (6141), the temperature-sensing unit (13) is projected on the direction parallel to the upper surface of the closest metal layer (6141), at least a part of the projection of the temperature-sensing unit (13) is located on the closest metal layer (6141), the temperature-sensing unit (13) can sense the temperature of the closest metal layer (6141), or the temperature-sensing unit (13) can sense the temperature of the upper plate layer (612) or the lower plate layer (613) in contact with the closest metal layer (6141).